Re: [yocto] Would COMPATIBLE_IMAGE make sense?

["Frederic Martinsons" <frederic.martinsons@gmail.com>]

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Hello, instead of creating a new variable (don't sure of its possible
usefulness), you can use BBMASK or review dependencies between your layer

PS: I did a similar answer on your stackoverflow question.

On Tue, 29 Jun 2021 at 01:29, Jonas Vautherin <jonas.vautherin@gmail.com>
wrote:

> I was thinking about my issue described here [1], and discovered the
> variables called COMPATIBLE_MACHINE and COMPATIBLE_HOST, which "you can use
> to stop recipes from being built for machines (/hosts) with which the
> recipes are not compatible". And so I wondered if it would make sense to
> add COMPATIBLE_IMAGE, for a similar purpose.
>
> Let me explain my issue: I define different images in different layers
> (say `first-project-image` and `second-project-image`), and in each of
> those layers I create `.bbappends` to configure some packages. Typically
> `hostapd` is used by both images, but with a different config file.
>
> The thing is that when I run `bitbake first-project-image`, because
> `second-project-image` is part of my bblayers.conf, then the
> hostapd_%.bbappend from `second-project-image` is used and may have an
> impact on `first-project-image`, which I don't want. I really want this
> bbappend to only affect the image `second-project-image`.
>
> One way I can see to deal with that is to realize that
> `first-project-image` and `second-project-image` are two different
> projects, and build them from two different BUILDDIRs. The thing I don't
> like here is that all the packages are therefore downloaded and built
> twice, which seems like a loss of time and space.
>
> That's where I thought about COMPATIBLE_IMAGE. In the hostapd_%.bbappend
> of `first-project-image`, I would set "COMPATIBLE_IMAGE =
> 'first-project-image'", and similarly for "COMPATIBLE_IMAGE =
> 'second-project-image'". So that I could still share a BUILDDIR between
> different projects.
>
> How bad of an idea is that?
>
> Thanks in advance,
> Jonas
>
> [1]: https://stackoverflow.com/questions/68167244/image-specific-layers
>
> 
>
>

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